8-bit microcontroller featuring an 8051 core architecture and 25MHz maximum frequency. This CMOS device offers 64KB of FLASH memory and 4.25KB of RAM. Integrated peripherals include 16 ADC channels, 6 PWM channels, 4 timers/counters, and multiple communication interfaces such as I2C, SPI, UART, USART, SMBus, and USB. The QFN-24 package measures 4 x 4 x 0.8mm and operates within a supply voltage range of 1.8V to 3.6V, with an operating temperature range of -40°C to 85°C.
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| Package/Case | QFN |
| Core Architecture | 8051 |
| Data Bus Width | 8b |
| Frequency | 25MHz |
| Height | 0.8mm |
| Interface | I2C, SPI, UART, USART, SMBus, 2-Wire |
| Length | 4mm |
| Max Frequency | 25MHz |
| Max Operating Temperature | 85°C |
| Max Supply Voltage | 3.6V |
| Memory Size | 64KB |
| Memory Type | FLASH, |
| Min Operating Temperature | -40°C |
| Min Supply Voltage | 1.8V |
| Number of ADC Channels | 16 |
| Number of I/Os | 16 |
| Number of Programmable I/O | 24 |
| Number of PWM Channels | 6 |
| Number of SPI Channels | 1 |
| Number of Timers/Counters | 4 |
| Number of UART Channels | 1 |
| Number of USB Channels | 1 |
| Oscillator Type | Internal |
| Package Quantity | 91 |
| Packaging | Rail/Tube |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT, Temp Sensor |
| Radiation Hardening | No |
| RAM Size | 4.25KB |
| Reach SVHC Compliant | No |
| RoHS Compliant | Yes |
| Series | C8051F9xx |
| Watchdog Timer | Yes |
| Width | 4mm |
| RoHS | Compliant |
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